From patchwork Fri Sep 21 08:18:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 972960 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 42GnVK65d2z9sCD for ; Fri, 21 Sep 2018 18:55:05 +1000 (AEST) Received: from localhost ([::1]:54577 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g3HDL-0004Bc-BK for incoming@patchwork.ozlabs.org; Fri, 21 Sep 2018 04:55:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48643) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g3Gh1-0005tQ-A6 for qemu-devel@nongnu.org; Fri, 21 Sep 2018 04:21:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g3Gh0-0007kF-G4 for qemu-devel@nongnu.org; Fri, 21 Sep 2018 04:21:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47506) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1g3Ggy-0007b9-FM; Fri, 21 Sep 2018 04:21:36 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A1E408830C; Fri, 21 Sep 2018 08:21:35 +0000 (UTC) Received: from laptop.redhat.com (ovpn-117-87.ams2.redhat.com [10.36.117.87]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5090C7D665; Fri, 21 Sep 2018 08:21:33 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org Date: Fri, 21 Sep 2018 10:18:16 +0200 Message-Id: <20180921081819.9203-26-eric.auger@redhat.com> In-Reply-To: <20180921081819.9203-1-eric.auger@redhat.com> References: <20180921081819.9203-1-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 21 Sep 2018 08:21:35 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v2 25/28] memory: Introduce IOMMU Memory Region inject_faults API X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yi.l.liu@intel.com, cdall@kernel.org, mst@redhat.com, jean-philippe.brucker@arm.com, peterx@redhat.com, alex.williamson@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This new API allows to inject @count iommu_faults into the IOMMU memory region. Signed-off-by: Eric Auger --- include/exec/memory.h | 26 ++++++++++++++++++++++++++ memory.c | 12 ++++++++++++ 2 files changed, 38 insertions(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index f54c39b248..45bcca2081 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -391,6 +391,20 @@ typedef struct IOMMUMemoryRegionClass { * @iommu: the IOMMUMemoryRegion */ int (*num_indexes)(IOMMUMemoryRegion *iommu); + +#ifdef CONFIG_LINUX + /* Inject @count faults into the IOMMU memory region + * + * Optional method: if this method is not provided, then + * memory_region_injection_faults() will return -ENOENT + * + * @iommu: the IOMMU memory region to inject the faults in + * @count: number of faults to inject + * @buf: fault buffer + */ + int (*inject_faults)(IOMMUMemoryRegion *iommu, int count, + struct iommu_fault *buf); +#endif } IOMMUMemoryRegionClass; typedef struct CoalescedMemoryRange CoalescedMemoryRange; @@ -1203,6 +1217,18 @@ int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr, */ int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr); +#ifdef CONFIG_LINUX +/** + * memory_region_inject_faults : inject @count faults stored in @buf + * + * @iommu_mr: the IOMMU memory region + * @count: number of faults to be injected + * @buf: buffer containing the faults + */ +int memory_region_inject_faults(IOMMUMemoryRegion *iommu_mr, int count, + struct iommu_fault *buf); +#endif + /** * memory_region_name: get a memory region's name * diff --git a/memory.c b/memory.c index 2c320bc14b..6ba8d31773 100644 --- a/memory.c +++ b/memory.c @@ -1976,6 +1976,18 @@ int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr) return imrc->num_indexes(iommu_mr); } +#ifdef CONFIG_LINUX +int memory_region_inject_faults(IOMMUMemoryRegion *iommu_mr, int count, + struct iommu_fault *buf) +{ + IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); + if (!imrc->inject_faults) { + return -ENOENT; + } + return imrc->inject_faults(iommu_mr, count, buf); +} +#endif + void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) { uint8_t mask = 1 << client;